SPICE model

The informative signal of the vast majority of sensors on piezoelectric transducers is the ToF (Time-of-Flight) of ultrasonic oscillations, and its formation is realized by measuring the delay between the pulses of oscillations emitted by the actuator and the pulses of these oscillations received by the sensor. However, the processes of forming this informative signal and the electronic means of implementing these processes are characterized by a significant influence of extraneous factors, the compensation of which is largely problematic.

The paper is devoted to the basic approaches to the realization of the macromodel of optocouplers on organic structures for sensor devices. It is shown that the use of such structures is largely limited due to the time drift of parameters and temperature instability. In the course  of the research, the possibility of compensating for these parameters directly during the operation of organic optocouples by measuring and analyzing the parameter drift was established. For this purpose, specialized built-in in-situ diagnostic systems and controlled signal transducers are used.

The task of impedance measurement transducers’ SPICE simulation is presented. Wide range of impedance spectroscopy microelectronic sensors, namely, for Internet of things, are based on such measurement transducers. One of the attractive aspect of impedance spectroscopy as a tool for investigating is the direct connection that often exists between the behavior of a real system and that of an idealized model circuit consisting of discrete electrical components. The paper describes the approach to Nyquist impedance plot calculation using SPICE models based on quadrature synchronous detectors.